Solve for a
a = \frac{19}{6} = 3\frac{1}{6} \approx 3.166666667
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6a-7=12
Swap sides so that all variable terms are on the left hand side.
6a=12+7
Add 7 to both sides.
6a=19
Add 12 and 7 to get 19.
a=\frac{19}{6}
Divide both sides by 6.
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